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9dc4d6448b
While it wasn't really "broken" before, if plugins use NMS (which they really should't be) and mess with entity management themselves, and get it wrong, they could ultimately corrupt our state expectations. I've been unable to reproduce any issues locally, but these changes are the result of me analyzing the code pretty deeply and seeing about how to make it more durable to abnormal usage. Any servers seeing oddities, please run with -Ddebug.entities=true and send me any logs triggered.
112 lines
5.9 KiB
Diff
112 lines
5.9 KiB
Diff
From 38b302a381c2e999cda2d6add7bf213adb295912 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 28 Jul 2018 12:18:27 -0400
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Subject: [PATCH] Ignore Dead Entities in entityList iteration
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A spigot change delays removal of entities from the entity list.
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This causes a change in behavior from Vanilla where getEntities type
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methods will return dead entities that they shouldn't otherwise be doing.
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This will ensure that dead entities are skipped from iteration since
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they shouldn't of been in the list in the first place.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
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index f38179e983..8e1bda4de9 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
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@@ -176,6 +176,7 @@ public class PaperCommand extends Command {
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List<Entity> entities = world.entityList;
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entities.forEach(e -> {
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MinecraftKey key = e.getMinecraftKey();
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+ if (e.shouldBeRemoved) return; // Paper
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MutablePair<Integer, Map<ChunkCoordIntPair, Integer>> info = list.computeIfAbsent(key, k -> MutablePair.of(0, Maps.newHashMap()));
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ChunkCoordIntPair chunk = new ChunkCoordIntPair(e.getChunkX(), e.getChunkZ());
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diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
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index ead5af991c..cf69a4d8a4 100644
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--- a/src/main/java/net/minecraft/server/Entity.java
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+++ b/src/main/java/net/minecraft/server/Entity.java
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@@ -121,6 +121,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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protected boolean F;
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private boolean az;
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public boolean dead;
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+ public boolean shouldBeRemoved; // Paper
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public float width;
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public float length;
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public float J;
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index 1cbe6e17b7..5d60b36678 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -1046,6 +1046,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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}
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entity.valid = true; // CraftBukkit
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+ entity.shouldBeRemoved = false; // Paper - shouldn't be removed after being re-added
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new com.destroystokyo.paper.event.entity.EntityAddToWorldEvent(entity.getBukkitEntity()).callEvent(); // Paper - fire while valid
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}
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@@ -1113,6 +1114,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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Chunk chunk = entity.getCurrentChunk(); // Paper
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if (chunk != null) chunk.removeEntity(entity); // Paper
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+ entity.shouldBeRemoved = true; // Paper
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if (!guardEntityList) { // Spigot - It will get removed after the tick if we are ticking // Paper - always remove from current chunk above
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// CraftBukkit start - Decrement loop variable field if we've already ticked this entity
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@@ -2316,6 +2318,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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while (iterator.hasNext()) {
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Entity entity = (Entity) iterator.next();
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+ if (entity.shouldBeRemoved) continue; // Paper
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if (oclass.isAssignableFrom(entity.getClass()) && predicate.test((T) entity)) { // CraftBukkit - decompile error
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list.add((T) entity); // CraftBukkit - decompile error
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@@ -2402,6 +2405,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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while (iterator.hasNext()) {
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Entity entity = (Entity) iterator.next();
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+ if (entity.shouldBeRemoved) continue; // Paper
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// CraftBukkit start - Split out persistent check, don't apply it to special persistent mobs
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if (entity instanceof EntityInsentient) {
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EntityInsentient entityinsentient = (EntityInsentient) entity;
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 609b911265..4594bab465 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -634,6 +634,7 @@ public class CraftWorld implements World {
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for (Object o : world.entityList) {
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if (o instanceof net.minecraft.server.Entity) {
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net.minecraft.server.Entity mcEnt = (net.minecraft.server.Entity) o;
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+ if (mcEnt.shouldBeRemoved) continue; // Paper
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Entity bukkitEntity = mcEnt.getBukkitEntity();
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// Assuming that bukkitEntity isn't null
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@@ -652,6 +653,7 @@ public class CraftWorld implements World {
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for (Object o : world.entityList) {
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if (o instanceof net.minecraft.server.Entity) {
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net.minecraft.server.Entity mcEnt = (net.minecraft.server.Entity) o;
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+ if (mcEnt.shouldBeRemoved) continue; // Paper
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Entity bukkitEntity = mcEnt.getBukkitEntity();
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// Assuming that bukkitEntity isn't null
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@@ -676,6 +678,7 @@ public class CraftWorld implements World {
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for (Object entity: world.entityList) {
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if (entity instanceof net.minecraft.server.Entity) {
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+ if (((net.minecraft.server.Entity) entity).shouldBeRemoved) continue; // Paper
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Entity bukkitEntity = ((net.minecraft.server.Entity) entity).getBukkitEntity();
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if (bukkitEntity == null) {
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@@ -698,6 +701,7 @@ public class CraftWorld implements World {
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for (Object entity: world.entityList) {
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if (entity instanceof net.minecraft.server.Entity) {
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+ if (((net.minecraft.server.Entity) entity).shouldBeRemoved) continue; // Paper
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Entity bukkitEntity = ((net.minecraft.server.Entity) entity).getBukkitEntity();
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if (bukkitEntity == null) {
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--
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2.21.0
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